diff --git a/plugin/hsModule.vim b/plugin/hsModule.vim
index cdd0f76..861009a 100644
--- a/plugin/hsModule.vim
+++ b/plugin/hsModule.vim
@@ -1,7 +1,13 @@
 command! InsertHaskellModuleName exe "normal! i".hsModule#MkModuleHeader()
 
 if !exists('g:hs_module_no_mappings')
-  autocmd FileType haskell nnoremap <buffer> M :InsertHaskellModuleName<CR>
+  if !exists('g:hs_module_mapping')
+    let g:hs_module_mapping = 'M'
+  endif
+
+  exec 'autocmd FileType haskell nnoremap <buffer> ' .
+     \ g:hs_module_mapping .
+     \ ' :InsertHaskellModuleName<CR>'
 endif
 
 if !exists('g:hs_module_no_auto')